removed imagemin-pngquant, causing error in os jenkins
removed imagemin-pngquant, causing error in os jenkins

bcgov/MyGovBC-MSP,f-w/MyGovBC-core-client,bcgov/MyGovBC-MSP,f-w/MyGovBC-core-client,f-w/MyGovBC-core-client,f-w/MyGovBC-core-client,bcgov/MyGovBC-MSP,bcgov/MyGovBC-MSP